Apparatus for showing distortion in the photoheliograph
1858-1876
1858-1876
1858-1861
1861
1857
1861
1861
1860-1862
1860-1862
1860-1862
1861
1861
1858-1861
1860
1857
1858-1862
1858-1868
1858-1868
1857
1858-1862
1858-1876
1860
1858
1857